<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		
		<script>
			
			function  showInfo(){
				
				
				for (let row = 1; row <=9; row++){ 
					let str = 'row: '+row+"      ";
				
				
					for (let column = 1; column <=9 ; column++) {
						if(column > row){
							break;
							// continue;
						}
						str += '\t'+row+'*'+column+'= '+(row * column);
					}
					console.log(str)
					
					
					
				}
				
				
			}
			
			
		</script>
		
	</head>
	<body>
		<h3>请打开浏览器控制台，观察结果</h3>
		<button onclick="showInfo()">输出乘法口诀</button>
		
	</body>
</html>